Kun-Feng Lyu

SN1987A constraints on the neutrino-dark-fermion interaction from resonant scattering with C$\nu$B

Neutrino self-interactions mediated by a light scalar offer a compelling resolution to cosmological tensions and may naturally arise in neutrino mass generation mechanisms. When the scalar also couples to a light dark-sector fermion, supernova neutrinos can resonantly annihilate with the cosmic neutrino background (C$\...